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Standard entropies of X(2), Y(2) and XY(...

Standard entropies of `X_(2), Y_(2) and XY_(3) are 60, 40 and 50 JK^(–1) mol^(–1)` respectively. For the reaction `(1)/(2)X_(2)+(3)/(2)Y_(2)hArr XY_(3)DeltaH=-30KJ `to be at equilibrium, the temperature should be:

A

500K

B

750K

C

1000K

D

1250K

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaS_(rxn)=50-(1)/(2)xx60-(3)/(2)xx-40JK^(-1)mol^(-1)`
`T=(DeltaH)/(DeltaS)=(-30xx10^(3))/(-40)rArr750K`
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